Structure 25504240703352 · Terrebonne County, LA

Us0090 over Chacahoula Bayou

Carries Us0090 over Chacahoula Bayou, 3.35 Mi East Of La 662.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,052 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

2,052 ft end to end, longest span 76 ft: about 5.7 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built199828 years old
Length2051.8 ft625.4 m
Daily traffic3,007counted 2021
Last inspectedOctober 2023every 24 months

Location

StateLouisiana
CountyTerrebonne
Location3.35 Mi East Of La 662
CarriesUs0090
CrossesChacahoula Bayou
Coordinates29.68986, -90.99530

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length2051.8 ft (625.4 m)
Max Span76.1 ft (23.2 m)
Deck Width43.0 ft (13.1 m)
Deck Area8192.7 sq m
Main Spans27
Year Built1998

Traffic

Avg Daily Traffic3,007 (2021)
Truck Traffic18%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number025504240703352

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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